1. ASTM A671 CG100 Class 51 yog dab tsi?
Teb:
ASTM A671 CG100 Chav Kawm 51 xaivhluav taws xob-fusion-welded (EFW) carbon steel kavrauultra-low- kub thiab siab - kev pabcuam siab.
CWJ 100: Carbon steel qib nrog tswj chemistry (piv txwv li, C Tsawg dua los yog sib npaug li 0.30%, Mn rau toughness).
Chav Kawm 51: Qhia txog qib siab tshaj plaws hauv ASTM A671, xav tau100% radiography, Txhim kho hydrostatic kuaj, thiab stricter tolerances dua Class 50/22.
Ntsiab Standard:ASTM A671 (EFW kav dej rau cryogenic thiab pressurized daim ntaub ntawv).
2. Cov kav 51 feem ntau siv nyob qhov twg?
Teb:
Cov kav dej no tau muab tso rau hauvib puag ncig heev, suav nrog:
LNG terminals(ua haujlwm qis dua -50℃F / -45 degree).
Sib sib zog nqus-sea oil/gas pipelines(siab sab nraud siab + corrosion kuj).
Nuclear / fais fab nroj tsuagyuav tsum tau xau- pov thawj kev ncaj ncees.
Nco tseg:Chav Kawm 51 raug xaiv rau cov txheej txheem tseem ceeb uas qhov tsis ua tiav tsis tuaj yeem lees txais.
3. Chav kawm 51 txawv li cas ntawm Chav Kawm 50 lossis Chav Kawm 22?
Teb:
| Feature | Chav Kawm 51 | Chav Kawm 50 | Chav Kawm 22 |
|---|---|---|---|
| Kev sim | 100% RT + UT, siab tshaj hydrotest siab | 100% RT, siab hydrotest | 100% RT, tus qauv hydrotest |
| Daim ntawv thov | Cryogenic siab + siab siab | Tsawg -temp/pressure | General qis -temp |
| Nqi | Siab tshaj (vim QA nruj) | Nruab nrab | qis |
Ntsiab Lus:Class 51 muabzero tolerance rau qhov tsis xws luagntawm NDT ntxiv (piv txwv li, kuaj ultrasonic).
4. Dab tsi yog cov khoom siv kho tshuab thiab tshuaj lom neeg ntawm CG100?
Teb:
Yield zog:Ntau tshaj lossis sib npaug rau 60 ksi (414 MPa).
Tensile zog:85-110 ksi (586-758 MPa).
Impact Test:Charpy V-ntaus ntawm-50 ° F (-45 ° F)(min 20 ft-lb avg zog).
Chemistry:Tsawg sulfur / phosphorus (tsawg dua lossis sib npaug li 0.025%) los tiv thaiv brittleness.
Fabrication Note: PWHT (Post-Weld Heat Treatment) is mandatory for thickness >1 nti (25.4 hli).
5. Yuav tsum muaj ntawv pov thawj thiab tshuaj xyuas dab tsi?
Teb:
Yuav tsum xeem:
100% Radiographic Testing (RT) + Ultrasonic Test (UT).
Hydrostatic Test ntawm1.5x tsim siab(rau ASME B31.3).
Cov ntaub ntawv:
Mill Test Reports (MTRs) nrog cov lej ntsuas cua sov.
Thib peb- daim ntawv pov thawj tshuaj xyuas tog (piv txwv li, DNV, ABS) rau cov haujlwm sab nrauv.
Tswv yim Pro:Rau kev pabcuam qaub (H₂S ib puag ncig), qhiaNACE MR0175 ua raws.
